(57) Described herein is a filter which includes a plurality of one-dimensional first
dimension filters (3, 7, 11, 15) operating in a first dimension, each of the filters
operating on the digital image data in accordance with predetermined filter coefficients
to produce a one-dimensional output signal. The filter also includes a plurality of
second one-dimensional filters (5. 9, 13, 17), operating in a second, distinct dimension,
each one-dimensional second dimension filter receiving output signals from one of
the plurality of the first dimension filters and operating on the received output
signals in accordance with predetermined filter coefficients to produce second filtered
output signals therefrom. A weighting circuit (10, s1, 12, s2, 14, s3, 16, SQ) is
operatively connected to the one-dimensional second dimension filters to modify each
of the produced second filtered output signals according to weighting coefficients.
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